Решение
(23.2.1)
![`and`(S[1] = `+`(`*`(3, `*`(a, `*`(h)))), `+`(`*`(3, `*`(a, `*`(h)))) = `+`(`*`(3, `*`(sqrt(3), `*`(r, `*`(h))))))](images/e_72.gif){kind=small}
![S[1] = `+`(`*`(5, `*`(`*`(`+`(`*`(3, `*`(sqrt(3)))), 2), `*`(sqrt(3)))))](images/e_73.gif){kind=small}
![S[1] = 90](images/e_74.gif){kind=small}